Injured tourists taken to a pier in Phuket before being transferred to hospitals following the fatal collision between two speedboats in the sea off Phuket on Wednesday. Two tourists were killed. (Photo by Phuket disaster alert centre via Achadtaya Chuenniran)

Two Chinese tourists were killed in a collision between two fully loaded speedboat ferries in the sea off Phuket on Wednesday, Phuket governor Chamroen Thippyawpongthada said.

He also said 34 other tourists were injured, an increase on the previously reported figure of 26.

The two boats, carrying 62 Chinese and South Korean tourists, collided in the Hin Musang area around 11.45am on Wednesday.

There were a total of 26 tourists on board the speedboat Chor Hongfa 20 and 36 tourists on the Chollakit 856.

The boats were heading from Phuket for Ao Phangnga in Phangna and Phi Phi island in Krabi.

The two people killed were Chinese passengers on the Chollakit 856, which sank after the collision.

The tourists treated for injuries were from the Chollakit 856.

The injured were being treated at Vachira Phuket Hospital, Mission Phuket Hospital, and a hospital run by the Phuket provincial administration organisation.

It was the second fatal boating accident involving tourists in less than a week.

On Sunday 28 people were injured when a speedboat carrying passengers back from an evening music concert on the island of Koh Samet smashed into a container ship.